Graphical user interface for a display screen or portion thereof



FIG. 1 is a front view of a graphical user interface for a displayscreen or portion thereof showing my new design;

FIG. 2 is a front view of a second embodiment thereof;

FIG. 3 is a front view of a third embodiment thereof; and,

FIG. 4 is a front view of a fourth embodiment thereof.

The broken line showing of the display screen forms no part of theclaimed design.

The AT&T trademark in the upper left corner of the Figures is aregistered trademark of AT&T Intellectual Property II, L.P. Trademarksare the property of their respective owners.

The ornamental design for a graphical user interface for a displayscreen or a portion thereof, as shown and described.